Question

what is the speed of light in vaccum? Don't copy by google!​

Answer 1

Answer:

2.99 × 10^8 m/sec

Explanation:

Its the actual speed of light in vacuum . It is also regarded as the speed of light in Air. And for convenience in reading and writing it is used as 3 × 10^8 m/sec

Answer 2

Answer:

The speed of light in vacuum, commonly denoted c, is a universal physical constant important in many areas of physics. Its exact value is defined as 299792458 metres per second.

Explanation:

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